<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <!-- 1.直接拼接 不推荐 语法过于繁琐-->
    <h2>{{firstName}} {{lastName}}</h2>
    <!-- 2.通过定义methods -->
    <h2>{{getfullName()}}</h2>
    <!-- 3.通过computed -->
    <h2>{{fullName}}</h2>
  </div>
  <script src="../js/vue.js"></script>
  <script>
    //TypeSctipt(microsoft)->ts(类型检测)
    //flow(facebook)
    const app = new Vue({
      el: '#app',
      data: {
        firstName: 'kobe',
        lastName: 'Bryant'
      },
      computed: {
        fullName: function () {
          return this.firstName + ' ' + this.lastName
        }
      },
      methods: {
        getfullName: function () {
          return this.firstName + ' ' + this.lastName
        }
      },

    })

  </script>
</body>

</html>